High-pressure hydrogen production with inherent sequestration of a pure carbon dioxide stream via fixed bed chemical looping

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

The proof of concept for the production of pure pressurized hydrogen from hydrocarbons in combination with the sequestration of a pure stream of carbon dioxide with the reformer steam iron cycle is presented. The iron oxide based oxygen carrier (95% Fe 2 O 3 , 5% Al 2 O 3 ) is reduced with syngas and oxidized with steam at 1023 K. The carbon dioxide separation is achieved via partial reduction of the oxygen carrier from Fe 2 O 3 to Fe 3 O 4 yielding thermodynamically to a product gas only containing CO 2 and H 2 O. By the subsequent condensation of steam, pure CO 2 is sequestrated. After each steam oxidation phase, an air oxidation was applied to restore the oxygen carrier to hematite level. Product gas pressures of up to 30.1 bar and hydrogen purities exceeding 99% were achieved via steam oxidations. The main impurities in the product gas are carbon monoxide and carbon dioxide, which originate from solid carbon depositions or from stored carbonaceous molecules inside the pores of the contact mass. The oxygen carrier samples were characterized using elemental analysis, BET surface area measurement, XRD powder diffraction, SEM and light microscopy. The maximum pressure of 95 bar was demonstrated for hydrogen production in the steam oxidation phase after the full oxygen carrier reduction, significantly reducing the energy demand for compressors in mobility applications.

Originalspracheenglisch
Seiten (von - bis)7943-7957
Seitenumfang15
FachzeitschriftInternational Journal of Hydrogen Energy
Jahrgang44
Ausgabenummer16
DOIs
PublikationsstatusVeröffentlicht - 29 Mär 2019

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hydrogen production
Hydrogen production
steam
carbon dioxide
beds
Carbon dioxide
Steam
Oxygen
oxygen
Oxidation
oxidation
products
Gases
microscopy
Hydrogen
synthesis gas
Hematite
hydrogen
compressors
hematite

Schlagwörter

    ASJC Scopus subject areas

    • !!Condensed Matter Physics
    • !!Energy Engineering and Power Technology
    • !!Fuel Technology
    • !!Renewable Energy, Sustainability and the Environment

    Fields of Expertise

    • Mobility & Production

    Dies zitieren

    High-pressure hydrogen production with inherent sequestration of a pure carbon dioxide stream via fixed bed chemical looping. / Zacharias, Robert; Visentin, Simone; Bock, Sebastian; Hacker, Viktor.

    in: International Journal of Hydrogen Energy, Jahrgang 44, Nr. 16, 29.03.2019, S. 7943-7957.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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    abstract = "The proof of concept for the production of pure pressurized hydrogen from hydrocarbons in combination with the sequestration of a pure stream of carbon dioxide with the reformer steam iron cycle is presented. The iron oxide based oxygen carrier (95{\%} Fe 2 O 3 , 5{\%} Al 2 O 3 ) is reduced with syngas and oxidized with steam at 1023 K. The carbon dioxide separation is achieved via partial reduction of the oxygen carrier from Fe 2 O 3 to Fe 3 O 4 yielding thermodynamically to a product gas only containing CO 2 and H 2 O. By the subsequent condensation of steam, pure CO 2 is sequestrated. After each steam oxidation phase, an air oxidation was applied to restore the oxygen carrier to hematite level. Product gas pressures of up to 30.1 bar and hydrogen purities exceeding 99{\%} were achieved via steam oxidations. The main impurities in the product gas are carbon monoxide and carbon dioxide, which originate from solid carbon depositions or from stored carbonaceous molecules inside the pores of the contact mass. The oxygen carrier samples were characterized using elemental analysis, BET surface area measurement, XRD powder diffraction, SEM and light microscopy. The maximum pressure of 95 bar was demonstrated for hydrogen production in the steam oxidation phase after the full oxygen carrier reduction, significantly reducing the energy demand for compressors in mobility applications.",
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